274 	/* We recover from previous CYC losses. */  in pt_time_update_mtc()
341 /* Adjust a CYC packet's payload spanning multiple MTC periods.
343  * CYC packets measure the Fast Counter since the last CYC(-eligible) packet.
344  * Depending on the CYC threshold, we may not get a CYC for each MTC, so a CYC
350  * If we find a CYC packet to span multiple MTC packets, though, we try to
354  * We only consider MTC.  For the first CYC after TSC, the corresponding TMA
359 static int pt_time_adjust_cyc(uint64_t *cyc, const struct pt_time *time,  in pt_time_adjust_cyc()  argument
379 	 *   fcr = (fc << pt_tcal_fcr_shr) / cyc  in pt_time_adjust_cyc()
381 	 * So cyc = (fc << pt_tcal_fcr_shr) / fcr.  in pt_time_adjust_cyc()
393 	total_cyc = *cyc;  in pt_time_adjust_cyc()
396 	 * CYC payload to any previous MTC period.  in pt_time_adjust_cyc()
398 	 * We lost an unknown portion of the CYC payload for the current MTC  in pt_time_adjust_cyc()
404 	*cyc = total_cyc - old_cyc;  in pt_time_adjust_cyc()
412 	uint64_t cyc, fc;  in pt_time_update_cyc()  local
422 	cyc = packet->value;  in pt_time_update_cyc()
427 		errcode = pt_time_adjust_cyc(&cyc, time, config, fcr);  in pt_time_update_cyc()
432 	fc += (cyc * fcr) >> pt_tcal_fcr_shr;  in pt_time_update_cyc()
522 	uint64_t tsc, last_tsc, tsc_delta, cyc, fcr;  in pt_tcal_header_tsc()  local
530 	cyc = tcal->cyc_tsc;  in pt_tcal_header_tsc()
537 	if (!last_tsc || !cyc)  in pt_tcal_header_tsc()
562 	fcr = (tsc_delta << pt_tcal_fcr_shr) / cyc;  in pt_tcal_header_tsc()
619 	uint64_t cyc, fc, fcr;  in pt_tcal_update_mtc()  local
627 	cyc = tcal->cyc_mtc;  in pt_tcal_update_mtc()
647 	if (!cyc)  in pt_tcal_update_mtc()
674 	fcr = (fc << pt_tcal_fcr_shr) / cyc;  in pt_tcal_update_mtc()
676 	/* SKL168: Intel(R) PT CYC Packets Can be Dropped When Immediately  in pt_tcal_update_mtc()
680 	 * it looks like we lost a wrap CYC packet.  in pt_tcal_update_mtc()
689 		/* The case is less clear for a lost wrap CYC packet since we do  in pt_tcal_update_mtc()
692 		 * The CYC counter wraps on the affected processors every 4096  in pt_tcal_update_mtc()
708 			dfc = (tcal->fcr * (cyc + 0xf00)) >> pt_tcal_fcr_shr;  in pt_tcal_update_mtc()
710 			/* If we didn't drop a wrap CYC, @dfc should be way  in pt_tcal_update_mtc()
733 	uint64_t cyc;  in pt_tcal_update_cyc()  local
740 	cyc = packet->value;  in pt_tcal_update_cyc()
741 	tcal->cyc_mtc += cyc;  in pt_tcal_update_cyc()
742 	tcal->cyc_tsc += cyc;  in pt_tcal_update_cyc()